JPH10328584A - Pressurized air feeder for electrostatic coating bell gun - Google Patents
Pressurized air feeder for electrostatic coating bell gunInfo
- Publication number
- JPH10328584A JPH10328584A JP9155848A JP15584897A JPH10328584A JP H10328584 A JPH10328584 A JP H10328584A JP 9155848 A JP9155848 A JP 9155848A JP 15584897 A JP15584897 A JP 15584897A JP H10328584 A JPH10328584 A JP H10328584A
- Authority
- JP
- Japan
- Prior art keywords
- air
- valve
- pilot
- pressurized air
- closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0426—Means for supplying shaping gas
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はエアータービンによ
り駆動されエアー軸受により支持されて高速回転するベ
ル型の霧化頭の内周面から遠心力と静電界の作用により
塗料を微粒化して放出するようにした静電塗装用ベル式
ガンの加圧空気供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bell-shaped atomizing head which is driven by an air turbine, is supported by an air bearing, and rotates at a high speed. The present invention relates to a pressurized air supply device for a bell gun for electrostatic coating.
【０００２】[0002]
【従来の技術】上記のような静電塗装用ベル式ガンの加
圧空気供給装置においては、エアータービン用の加圧空
気の供給経路とエアー軸受用の加圧空気の供給経路が別
々になっていて、軸受の焼き付きを防止するために必ず
エアータービン用の経路の開閉弁を開く前にエアー軸受
用の経路の開閉弁を開き、また、エアータービン用の経
路の開閉弁を閉じてからエアー軸受用の経路の開閉弁を
閉じなければならなかった。2. Description of the Related Art In a pressurized air supply apparatus for a bell gun for electrostatic coating as described above, a supply path of pressurized air for an air turbine and a supply path of pressurized air for an air bearing are separated. In order to prevent bearing seizure, always open the air bearing path open / close valve before opening the air turbine path open / close valve, and close the air turbine path open / close valve before opening the air turbine path open / close valve. The on-off valve in the path for the bearing had to be closed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、その開
閉順序を間違えてエアー軸受を焼き付けさせるおそれが
あるという課題があった。However, there is a problem that the air bearing may be burned in the wrong order of opening and closing.
【０００４】[0004]
【課題を解決するための手段、作用及び効果】本発明は
このような課題を解決するための手段として、加圧空気
供給源の手動開閉弁を開くとエアータービン用のパイロ
ット開閉弁に先立ってエアー軸受用のパイロット開閉弁
が開き、手動開閉弁を閉じるとエアータービン用のパイ
ロット開閉弁が閉じた後にエアー軸受用のパイロット開
閉弁が閉じる回路構成としたから、エアータービンの回
転中は必ずエアー軸受に加圧空気が供給されていて焼き
付きが生じるのを確実に防止することができる効果があ
る。According to the present invention, as a means for solving such a problem, when a manual opening / closing valve of a pressurized air supply source is opened, the opening / closing valve for the air turbine is opened prior to a pilot opening / closing valve for the air turbine. When the pilot valve for the air bearing is opened and the manual valve is closed, the pilot valve for the air turbine is closed and then the pilot valve for the air bearing is closed. This has the effect of reliably preventing the occurrence of seizure due to the supply of pressurized air to the bearing.
【０００５】[0005]
【発明の実施の形態】以下、本発明の一実施の形態を添
付図面に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.
【０００６】図１〜３において、１は手動式の静電塗装
用ベル式ガンの本体であって、図１にエアータービン２
の駆動用加圧空気の供給経路を示し、同図において３は
本体１のグリップ４に差し込まれたパイプからなる経路
であり、加圧空気は経路３から本体１に形成された経路
５を通り、エアータービン２を回転駆動してから排気孔
６を通って排出されるようになっており、エアータービ
ン２にはベル型の霧化頭７が連結されていて高速度で回
転し、内周面に供給された液体塗料が遠心力と図示しな
い高電圧発生器により形成される静電力により微粒化さ
れて図示しない被塗装物に塗着するようになっている。In FIGS. 1 to 3, reference numeral 1 denotes a main body of a manual type bell gun for electrostatic coating, and FIG.
In the figure, reference numeral 3 denotes a path composed of a pipe inserted into a grip 4 of the main body 1, and pressurized air passes through a path 5 formed in the main body 1 from the path 3. After the air turbine 2 is driven to rotate, the air is exhausted through an exhaust hole 6. A bell-shaped atomizing head 7 is connected to the air turbine 2 and rotates at a high speed. The liquid paint supplied to the surface is atomized by centrifugal force and electrostatic force generated by a high voltage generator (not shown), and is applied to an object (not shown).
【０００７】図２はエアータービン２と霧化頭７の連結
軸８を受けるエアー軸受９に加圧空気を供給する経路を
示し、同図において１０は本体１のグリップ４に差し込
まれたパイプからなる経路であり、加圧空気は経路１０
から本体１に形成された経路１１を通り、エアー軸受９
に供給される。FIG. 2 shows a path for supplying pressurized air to an air bearing 9 which receives a connection shaft 8 between the air turbine 2 and the atomizing head 7. In FIG. 2, reference numeral 10 denotes a pipe from a pipe inserted into the grip 4 of the main body 1. And the pressurized air passes through the path 10
From the air bearing 9 through a path 11 formed in the main body 1
Supplied to
【０００８】エアー軸受９はラジアルメタル１２に形成
された通孔１３を通って連結軸８の外周に流入するとと
もにスラストメタル１４に形成された通孔１５を通って
スラストプレート１６の外周に流入することにより、エ
アータービン２と霧化頭７を半径方向及び軸方向に極め
て小さい摺動抵抗で回転自由に支持している。The air bearing 9 flows into the outer periphery of the connecting shaft 8 through a through hole 13 formed in the radial metal 12, and also flows into the outer periphery of the thrust plate 16 through a through hole 15 formed in the thrust metal 14. Thus, the air turbine 2 and the atomizing head 7 are rotatably supported in the radial and axial directions with extremely small sliding resistance.
【０００９】本体１には霧化頭７から放出される塗料の
放出角度を制御するシェーピングエアーの供給経路１７
が形成されているがその説明は省略する。The main body 1 has a supply path 17 for shaping air for controlling the discharge angle of the paint discharged from the atomizing head 7.
Are formed, but the description is omitted.
【００１０】図３は上記各経路３、１０、１７と加圧空
気供給源１８との接続関係を示す回路図である。FIG. 3 is a circuit diagram showing a connection relationship between each of the paths 3, 10, 17 and the pressurized air supply source 18. As shown in FIG.
【００１１】エアータービン２の駆動用の加圧空気の経
路３には、加圧空気供給源１８との間に、フィルタ１
９、手動開閉弁２０、レギュレータ２１及び常閉式のパ
イロット開閉弁２２が介設され、エアー軸受９に供給さ
れる加圧空気の経路１０はフィルタ１９と手動開閉弁２
０の間から分岐されて常閉式のパイロット開閉弁２３と
レギュレータ２４が介設されており、シェーピングエア
ーの経路１７はパイロット開閉弁２３とレギュレータ２
４の間から分岐されてレギュレータ２５が介設されてい
る。A filter 3 is provided between a pressurized air supply source 18 and a pressurized air supply source 18 in a path 3 of the pressurized air for driving the air turbine 2.
9, a manual opening / closing valve 20, a regulator 21 and a normally closed pilot opening / closing valve 22 are interposed, and a path 10 of pressurized air supplied to the air bearing 9 is provided with a filter 19 and a manual opening / closing valve 2.
0, a normally closed pilot on-off valve 23 and a regulator 24 are interposed. The shaping air path 17 is connected to the pilot on-off valve 23 and the regulator 2.
4 and a regulator 25 is interposed.
【００１２】また、経路３のパイロット開閉弁２２のパ
イロット室は可変絞り弁と逆止弁のユニット２８を介し
て経路１０に接続され、エアータンク２９にも接続され
ており、経路１０のパイロット開閉弁２３のパイロット
室は可変絞り弁と逆止弁のユニット２６を介して経路３
の手動開閉弁２０とレギュレータ２１の間に接続され、
エアータンク２７にも接続されている。The pilot chamber of the pilot opening / closing valve 22 in the path 3 is connected to the path 10 via a variable throttle valve and a check valve unit 28 and is also connected to the air tank 29. The pilot chamber of the valve 23 is connected to the path 3 through a unit 26 of a variable throttle valve and a check valve.
Is connected between the manual open / close valve 20 and the regulator 21;
It is also connected to the air tank 27.
【００１３】本実施の形態は上記構成になり、手動開閉
弁２０が閉じているときはパイロット開閉弁２２、２３
が閉じているため、いずれの経路３、１０、１７にも加
圧空気は供給されない。The present embodiment has the above-described configuration, and when the manual on-off valve 20 is closed, the pilot on-off valves 22, 23
Is closed, no pressurized air is supplied to any of the paths 3, 10, 17.
【００１４】手動開閉弁２０を開くと、パイロット開閉
弁２２が閉じているためエアータービン２の駆動用の加
圧空気の経路３には加圧空気は供給されず、ユニット２
６の逆止弁が開いてパイロット開閉弁２３のパイロット
室の圧力が上昇し、この弁２３が開くことによりエアー
軸受９用の経路１０に加圧空気が供給されてエアー軸受
９が作動する。When the manual on-off valve 20 is opened, no pressurized air is supplied to the path 3 of the pressurized air for driving the air turbine 2 because the pilot on-off valve 22 is closed.
The check valve 6 opens and the pressure in the pilot chamber of the pilot on-off valve 23 rises. When the valve 23 opens, pressurized air is supplied to the path 10 for the air bearing 9 and the air bearing 9 operates.
【００１５】すると、ユニット２８の可変絞り弁を通っ
てエアータンク２９に加圧空気が徐々に供給され、その
圧力が一定値に達するとパイロット開閉弁２２が開いて
エアータービン２の駆動用の加圧空気の経路３に加圧空
気が供給されてエアータービン２が駆動され霧化頭７が
回転して塗装が行われる。Then, pressurized air is gradually supplied to the air tank 29 through the variable throttle valve of the unit 28, and when the pressure reaches a certain value, the pilot opening / closing valve 22 is opened to open the valve for driving the air turbine 2. Pressurized air is supplied to the compressed air path 3 to drive the air turbine 2 to rotate the atomizing head 7 to perform coating.
【００１６】次に、手動開閉弁２０を閉じると、経路３
が閉じてエアータービン２が停止した後にエアータンク
２７内の加圧空気がユニット２６の可変絞り弁を通って
徐々に経路３に盗失してパイロット開閉弁２３のパイロ
ット室の圧力がゆっくりと低下し相当時間を経てその圧
力が一定値以下になるとパイロット開閉弁２３が閉じて
エアー軸受９が停止する。Next, when the manual on-off valve 20 is closed,
Is closed, and after the air turbine 2 stops, the pressurized air in the air tank 27 gradually passes through the variable throttle valve of the unit 26 to the path 3 and the pressure in the pilot chamber of the pilot on-off valve 23 decreases slowly. When the pressure becomes equal to or less than a predetermined value after a considerable time, the pilot valve 23 closes and the air bearing 9 stops.
【００１７】したがって、エアータービン２の回転中は
エアー軸受９が必ず回転するようになっており、焼き付
きのおそれはない。Therefore, while the air turbine 2 is rotating, the air bearing 9 always rotates, and there is no risk of seizure.
【図１】エアータービンの駆動用加圧空気の供給経路を
示すスプレイガンの本体の断面図である。FIG. 1 is a sectional view of a main body of a spray gun showing a supply path of pressurized air for driving an air turbine.
【図２】エアー軸受の作動用加圧空気の供給経路を示す
スプレイガンの本体の断面図である。FIG. 2 is a sectional view of a main body of a spray gun showing a supply path of pressurized air for operating an air bearing.
【図３】加圧空気供給経路を示す回路図である。FIG. 3 is a circuit diagram showing a pressurized air supply path.
１：スプレイガンの本体 ２：エアータービン ３、５：エアータービン駆動用加圧空気の経路 ７：霧化頭 ９：エアー軸受 １０、１１：エアー軸受作動用の加圧空気の経路 1: Main body of spray gun 2: Air turbine 3, 5: Path of pressurized air for driving air turbine 7: Atomization head 9: Air bearing 10, 11: Path of pressurized air for operating air bearing
Claims (1)
受により支持されて高速回転するベル型の霧化頭の内周
面から遠心力と静電界の作用により塗料を微粒化して放
出するようにした静電塗装用ベル式ガンの加圧空気供給
装置において、加圧空気供給源の手動開閉弁を開くと前
記エアータービン用のパイロット開閉弁に先立って前記
エアー軸受用のパイロット開閉弁が開き、前記手動開閉
弁を閉じると前記エアータービン用のパイロット開閉弁
が閉じた後に前記エアー軸受用のパイロット開閉弁が閉
じる回路構成としたことを特徴とする静電塗装用ベル式
ガンの加圧空気供給装置。1. An electrostatic device in which a paint is atomized and discharged from the inner peripheral surface of a bell-shaped atomizing head driven by an air turbine and supported by an air bearing and rotating at a high speed by the action of a centrifugal force and an electrostatic field. In the pressurized air supply device of the painting bell gun, when the manual open / close valve of the pressurized air supply source is opened, the pilot open / close valve for the air bearing is opened prior to the pilot open / close valve for the air turbine, and the manual open / close valve is opened. A pressurized air supply device for a bell gun for electrostatic coating, wherein the circuit is configured such that when the valve is closed, the pilot valve for the air turbine is closed after the pilot valve for the air turbine is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9155848A JPH10328584A (en) | 1997-05-28 | 1997-05-28 | Pressurized air feeder for electrostatic coating bell gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9155848A JPH10328584A (en) | 1997-05-28 | 1997-05-28 | Pressurized air feeder for electrostatic coating bell gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10328584A true JPH10328584A (en) | 1998-12-15 |
Family
ID=15614831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9155848A Pending JPH10328584A (en) | 1997-05-28 | 1997-05-28 | Pressurized air feeder for electrostatic coating bell gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10328584A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003024834A (en) * | 2001-07-16 | 2003-01-28 | Asahi Sunac Corp | Electrostatic coating apparatus |
-
1997
- 1997-05-28 JP JP9155848A patent/JPH10328584A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003024834A (en) * | 2001-07-16 | 2003-01-28 | Asahi Sunac Corp | Electrostatic coating apparatus |
| JP4623878B2 (en) * | 2001-07-16 | 2011-02-02 | 旭サナック株式会社 | Electrostatic coating equipment |
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